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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '446dfcd0123d5c065a617f37b762ec559f8f40fe16f8c82f6b96f7d03dedde2d' 
  AND token = 'Ulhop8mlZhC1fVBtl+3qVLI6a+TwBnC3eDb89hynJ54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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