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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '579334d01991d3e39c08027dabeb15390c53217ef31a1e6f879896a2942c6580' 
  AND token = 'T3uIH6nIQ0Ri5w8lnLIK1q83G7GdpyGxIeM3CBMC2rU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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