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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f2ded905cd067d359d2daecd8ef9d948666a6d55abb1b3c2650e3f7db3a2ab7a' 
  AND token = 'jdVa2Lgp1YSI6X96XbDcRHb8YWVy4qeCPGdTYYEYEOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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