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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f57fb2ead68bb14b0cbc96ffebdfc735a3e642eac7c633f313b65e0802c23f3e' 
  AND token = 'aAxJs/40QUNLI8F4llVxATqt4GLWGoYMMc8yISvE2zY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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