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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f75c445b72b1745dc7a4250894c9d9afb9f1e8f2a41c173ef203b73cdb86a87e' 
  AND token = 'I8q0b0ExSVydSDnA4aJE+u9VFt82KQF4/acubcvqycg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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