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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '459bc46c519a89da2d35bb9bcf74c07b5c1b0ef9e4a4442b1c99216abe7968cb' 
  AND token = 'FWhGGgR8RkcNnoXJSNkIvvKrDLQw11pSMz57xgBH4+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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