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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '072f0bbe23c1099078867a4030f9fadbfabc2d3817fe22a97cf63ed90bddc988' 
  AND token = '2I7j5KT3s7/aJ3uxjG9nlJJaVIUNeQPr/1NzwLGq0tc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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