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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f06e3e7d0ce8b97cd28cab9dd0b07c3855723f8124564e1824daf648c5039326' 
  AND token = 'x1rXFqSEb/cF1PVA3TkEIaX8hbLSqf3WWft96MXLGrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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