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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10eb4666e3c152048ca02ac3354f7ff1559e4bdd43e7e3d0cddb1bcea68e6908' 
  AND token = 'SQ1KSbrCvZKpEp+doty4/961MssM2hCEQ/DIvUMW7ls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}