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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '70b67a5d526d40360649d4e550dda2d69ed9db901a22d6c6616eb52f51a6b2fd' 
  AND token = 'pX2JE9rxnarh2XQADKRz1cGnd7f+sozFIv3yDFhFTBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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