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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '55d80251730c1d81541e6dc17e62e88bc24df419c8ed504e95b44478b39f11d3' 
  AND token = 'Air4tcOTDdHEnvX1pBlcfpieTN8/MtU8J0bJtjYfjIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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