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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ca1f1162e53a23c15d83f76d175120da78fa05a170b1733c0180a1f6afb5ee7' 
  AND token = 'Lfb3mntAsacSFEuFyB6/vixERupYQJG/l7xc0Pc1DIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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