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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd747a1d80ab52dcd9603fa73ef5930e3356dfd6230f311315641ef97b4b19466' 
  AND token = 'NFPKhRC2N1imn1H+Csy60tuC2qzOqcVNxeWT9dG0J+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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