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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8c11bd741c86ee0ec77516d8cea53bfa956c8954a3e228917b411a2f0d200183' 
  AND token = 'NL2mZ2nZkxNHXjdlf+xo5/uVX5dCiHnEMCv2xcVudPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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