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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '74a01e8e6d8f5184383200a1a39f0b1bfba187717c4c6073ff2a879c8224f8f4' 
  AND token = 'cdiunFWlNvm4lJtUaDjApMw9boFLHD2h6cD8+dduyWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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