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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57208c07bf23edb00cc196c132f5f34d2b09132335514c12fccfaec117311e2b' 
  AND token = 'XBOBR95x5pyPgjrULxv5ol6+NM3OyYAIpWjcNE9b2LA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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