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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6fae80d8bfa65c8cec9ef34e881f9d09e542bd88e13044d3e954befad72cad5' 
  AND token = 'm7c6+lhXXa+61foDLi6F4hGLAESjSMiQsrdCeJAAs/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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