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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea099fc25e59892beca3eb7fbac0ac4953ad04344c526aa2024046057db24611' 
  AND token = 'zEqP7qKbJ6BFZqyj6SF9PARbFDsVAJfx5EoeMi1Nup0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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