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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9d1c569cd7414ab97fdf73f3e9a07d8063106ca432078559bac25b40ce9bdf6' 
  AND token = '176Z71Rj7zriEvHz1ub6yamtDfszFq3ZCTv0X+Bacqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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