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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5551565728848427bc83c725922dfd0831caf9774e7ab705f32208cb8b3edc1' 
  AND token = 'Wm1mxAKXfA4D1CMokaMpRLKg6kh0z2v5TxLN8GNq8vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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