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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca37d2a30cde01da2d57c41c0225c72d6ff5939db7157e7012b5d0697cee9069' 
  AND token = 'jpQb113O8fdypaJe3tuoG4a9S0oV1u+fCs1MXsZ4JxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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