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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '181d4d1e1c360493871e9f9520802fde4af747ab4d9fe94ab00dc64857b1961e' 
  AND token = 'bcDBy09r195fDLEoYGQybpC4uNRWpav+pszn7OSPoTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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