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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0953a73259940b1789d9a935c6fd0ece6852d5f41b5ee75099a683bb9327547c' 
  AND token = 'H5Oo9ngG7Hdt1pD5Guf3mvlvnCjYuA7YKByFEjdD1WU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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