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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '032a44b4c033ab4f687c1425e004a3f85108b0afb87ff18412c8b607165c5947' 
  AND token = 'tochLc9RjZm7cIceUDBU8TuLWNreEBM634MHes1JVgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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