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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1005583c8b2bc7262f79597e46f3cd273c0359987d59d0eef34158c19e70a022' 
  AND token = 'Nxwz6skUSCsRY5s9yXR36pQIXPPswTU74aXABrBXmRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}