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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd097d02c9546058eab114be8e50aeaee97c44cb677a182eddf769c5676dda7f' 
  AND token = '10ccQ0BmKwQRySBSHz6nVsMMWcQQFTHKjDXE0Ubh0Es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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