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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9278f0add332668ca58b9cf12235678612c09ce0e276907058080b5dc3fa8991' 
  AND token = 'ZBGC4REP2hH4eQXWbU4NgSlQrcl4AaMi/hS8be7dy2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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