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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7eba95c0bd8f4c7fc92411f417bbc0f93ab7f93ffd9371af8074c164af691661' 
  AND token = 'EWyqxqj1iVcYKA+pypz0IgUpVJJDQSJhsoUX0Rrayb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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