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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0022b3ee14b383516c5563de6a03a824264b6966f086f445a0c1fabc59564ad' 
  AND token = 'c5aK+7Hq5XEFp40/o+/+wS4jl94jCc+zn5tiRxSp0l4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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