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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebf044a2491bb344125e21bfc2f918f47b8be2ff87915131b29562b5a4fa2217' 
  AND token = 'Bw+AXPR8qqCqacyAecNxCbGCgD/QegP0P9J0DqD04Tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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