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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '447a7f32efa36d828ba23237c083bbd87f2f68a1c91a8fb9e4fef7c312d67541' 
  AND token = 'j9HPNZN05XRT7DTqDxspJLF9vIZFbJrXcibZwKq1wXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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