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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0a008337aa212f1dcca0f93851bab0612f02b4c2f1ff45ba740f19aebb182f9' 
  AND token = 'dBtY2Y43y3p6QZQCPRd9D7s56s9ZI21htFt6FKKiUTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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